Generate and verify subgraph schema in CI

.github/workflows/_schema.yml

@@ -0,0 +1,58 @@
+on:
+  workflow_call:
+    secrets:
+      APOLLO_STUDIO:
+        required: true
+
+jobs:
+  generate:
+    runs-on: ubuntu-latest
+    services:
+      ispyb:
+        image: ghcr.io/diamondlightsource/ispyb-database:v3.0.0
+        ports:
+          - 3306:3306
+        env:
+          MARIADB_ROOT_PASSWORD: rootpassword
+        options: >
+          --health-cmd "/usr/local/bin/healthcheck.sh --defaults-file=/ispyb/.my.cnf --connect"
+    env:
+      DATABASE_URL: mysql+pymysql://root:rootpassword@localhost/ispyb_build
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install python packages
+        uses: ./.github/actions/install_requirements
+
+      - name: Generate schema
+        run: graph-energy-scan schema -p energy-scan.graphql
+
+      - name: Upload schema artifact
+        uses: actions/upload-artifact@v4
+        with:
+            name: energy-scan.graphql
+            path: energy-scan.graphql
+
+      - name: Install Rover CLI
+        run: |
+          curl -sSL https://rover.apollo.dev/nix/v0.23.0-rc.3 | sh
+          echo "$HOME/.rover/bin" >> $GITHUB_PATH
+
+      - name: Check subgraph schema
+        run: >
+          rover subgraph check data-gateway-n63jcf@current
+          --schema energy-scan.graphql
+          --name energy-scan
+        env:
+          APOLLO_KEY: ${{ secrets.APOLLO_STUDIO }}
+
+      - name: Publish subgraph schema to Apollo Studio
+        if: ${{ github.event_name == 'push' && startsWith(github.ref, 'refs/tags') }}
+        run: >
+          rover subgraph publish data-gateway-n63jcf@current 
+          --routing-url http://sessions:80 
+          --schema energy-scan.graphql
+          --name energy-scan
+        env:
+          APOLLO_KEY: ${{ secrets.APOLLO_STUDIO }}

.github/workflows/ci.yml

@@ -28,6 +28,13 @@ jobs:
     secrets:
       CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
 
+  schema:
+    needs: check
+    if: needs.check.outputs.branch-pr == ''
+    uses: ./.github/workflows/_schema.yml
+    secrets:
+      APOLLO_STUDIO: ${{ secrets.APOLLO_STUDIO }}
+
   container:
     needs: check
     if: needs.check.outputs.branch-pr == ''